Where Do's The Name Lucifer Come From?

Lucifer was the devils name before he got booted out of Heaven. I do not have bible in front of me but Isaiah chap 14? And Ezek.20 something. Lucifer was the most beautiful, scholars believe
he led worship to the Almighty God our Saviour and got Jealous, which led to prIde and he and one third of angels went with him,these angels are called demons,evil spirits and go to and fro looking for a body to enter and use people for example lots but not all prof. In our Universities
to sow unbelief and forms of indoctrination in impressionable young minds